When Dev Patel first appeared at the Toronto International Film Festival or TIFF, he had yet to transition from his teens into his twenties. He was gawky and at that awkward age when the fuzz has yet to flower. Ten years later, facial hair isn’t his problem. He has sported a full beard since Lion (2016), which also had its world premiere at TIFF. The connection, though, between that 2008 Toronto bow as Jamal in Slumdog Millionaire, and his presence this year is that he returned to the city with Hotel Mumbai.